Showing 6 results for Barzegar
Hamidreza Barzegarpoor, Hamid Rajabi, Saied Mohammadi, Rana Fayazmilani,
Volume 0, Issue 0 (11-2019)
Abstract
Performing a mental exertion during an exercise increase fatigue indices and the amount of fatigue seems to depend on the type of mental exertion. So, the purpose of the present study is comparing the effects of performing types of mental exertion during cycling exercise on fatigue indicators. Methods: 10 cyclist men with average peak power output 236 ± 36 W invited for 5 different sessions. In the first session, anthropometric characteristics and of cycling peak power output (PPO) have determined. In the next four sessions, cycling for 45-min at 65% PPO on the cycle ergometer with (Stroop, AX-CPT and PVT) or without mental exertion. Rate of perceived exertion (RPE) and heart rate were recorded while cycling every 10 min and cortisol concentration was measured before and 30 min after exercise finished. Two-way repeated-measures ANOVAs were used to analyzing data. Results: Performing 45 minutes of Stroop mental exertion during cycling exercise increased RPE and cortisol concentration compared to cycling exercise alone (P˂0/05) but there is no differences between AX-CPT and PVT to cycling exercise alone. Conclusion: The results of the present study showed that performing Stroop mental exertion during the cycling exercise than cycling exercise alone increase more the fatigue indices.
Mrs Faeze Nemati, Dr Mostafa Zareei, Mr Morteza Barzegar Bafrouei,
Volume 0, Issue 0 (11-2019)
Abstract
Introduction: Studies have shown that anterior cruciate ligament injury causes long-term periods of disability and long-term effects; Therefore, it is necessary to adopt preventive measures as well as to have studies that determine the effect of injury prevention programs in improving the performance level of players. Therefore, the purpose of this study was to investigate the effect of eight weeks of the anterior cruciate ligament injury prevention program on the function of elite female kabaddi athletes.
Materials and Methods: This research is semi-experimental based on the application of the intervention variable. 27 female kabaddi athletes with an age range of 18-24 years were randomly divided into two intervention and control groups. The intervention group performed prevention injury and enhance performance program exercises for 8 weeks. The tests were taken before and after eight weeks of the PEP program. These evaluations included T-test, 20-meter sprint test, Y-balance test, sitting and reaching flexibility test, hopping test and functional movement screening test. leven's statistical test was used to check the homogeneity of variances and ANCOVA test was used to evaluate and compare the data.
Findings: The results of the covariance analysis test showed that the intervention group had significantly better scores compared to the control group in the Y-balance tests of the right (p=0.002) and left leg (p=0.001), single leg hopping with right leg (p=0.004) and left leg (p=0.000), crossover hopping with right leg (p=0.023) and sit and reach flexibility test (p=0.003) after eight weeks of exercises In addition, in the tests of sprinting (p=0.649), agility (p=0.073), triple hopping with left leg (p=0.784) and right leg (p=0.204), crossover hopping with left leg (p=0.540) and functional movement screening test (p=0.943) did not show any significant difference between the two groups.
Results: The results of this research showed that the eight-week prevention injury and enhance performance program has a significant effect on the dynamic balance of the right and left legs, hopping (single leg hopping and crossover hopping of the right leg), and the flexibility of the hamstrings and lower back of elite female kabaddi athletes; But hopping (triple hopping and left leg crossover hopping), speed, agility and FMS test scores have no significant effect.
Mr Hamid Reza Barzegar Pour, Dr Fariborz Hovanloo, Dr Hamid Rajabi, Mr Naser Asgarzadeh,
Volume 14, Issue 11 (4-2016)
Abstract
The aim of the present research is comparing the effectof periodic trainingin hypoxic and normoxic conditions on anaerobic performance of athletes .Subjects of this research were 16 male volunteer students.Subjects were divided to two groups of eight by exercising in hypoxic condition(H 3300) normocytic.Anaerobic performance (peak power, average power) through the Wingate test and lactate concentration were measured before and after the Wingate test.After 24 hours in hypoxic condition,and after 48 hours in normoxic condition the measures of W max were determined.The intensity of exercises in both groups (one minute with intensity of 80% -85% Wmax, and two minutes with 50% Wmax) and exercise duration (30 minutes)were equalized. The training program consisted of 12 sessions in a row. After that the pre-test variables were measured again .After testing the normal distribution given by Kolmogorov – Smirnov test, dependent and independent t-Test with a confidence level of 0.05 ≥ p showed that this training improved aerobic performance in both groups, also five minutes after the Wingate test lactate concentration was decreased in both groups, but there was no difference between the 12 sessions of the periodic training in hypoxic and normoxic conditions on anaerobic performance. So it can be stated that the training used in this study can improve the anaerobic performance, but the severity and duration of hypoxia used in this study was not so much to improve anaerobic performance in hypoxic group more than normocyticone
Dr Ali Barzegari, Dr Saeid Naghibi, Samaneh Safayi, Dr Mohammadhasan Dashti Khovidaki, Dr Anahita Salehi,
Volume 20, Issue 24 (3-2023)
Abstract
The purpose of this study was to compare two methods of aerobic exercise on the levels of SOD and TNF-α in the heart tissue of diabetic rats. 40 male Wistar rats aged ten weeks were randomly divided into four groups of 10: healthy control, diabetes, diabetes+MIT and diabetes+HIT. The moderate intensity training group ran 5 sessions per week for 8 weeks on the treadmill for 60 minutes at a speed of 25 meters per minute, and the high intensity training group also 5 sessions per week for 8 weeks with a training time of 60 minutes and at a speed of 34 meters per minute. The heart tissue of rats was examined to determine the amount of changes in SOD and TNF-α using ELISA method. To investigate the difference between groups of variables, one-way analysis of variance and Tukey's post hoc statistical tests were used at the significance level of P≥0.05. The results showed that there was a significant difference in the levels of TNF-α and SOD in the heart tissue of rats among the four research groups (P≤0.001). The levels of TNF-α in the HIT training group also showed a significant decrease compared to the diabetic group (P=0.001), While these changes in the MIT exercise group compared to the diabetes group was a non-significant decrease (P=0.117), the amount of SOD levels between the MIT and HIT exercise groups also showed a significant increase compared to the diabetic group (P=0.001). It seems, aerobic exercise with different intensities can improve SOD and TNF-α levels. Although the intensity of exercise in periodic exercise has been an effective factor in changing the values of both variables.
Mohsen Soltani, Ali Barzegari, Saeed Naghibi, Mohammad Hassaan Dashty Khavidaki,
Volume 21, Issue 26 (12-2023)
Abstract
This study aimed to investigate the effect of quercetin supplementation and training on myostatin and follistatin levels in the heart tissue of diabetic rats. Methods: For this purpose, 50 10-week-old male Wistar rats with an average weight of 237±33 grams were randomly divided into five groups of 10 including: healthy control, diabetes, diabetes+supplement, diabetes+exercise, and diabetes+supplement+exercise. . The training protocol includes five sessions per week for eight weeks on a treadmill without a special slope. The rodents ran for 60 minutes at a speed of 25 meters per minute in each session.and the supplement groups received 50 mg/kg quercetin daily by gavage. The results showed that the difference in myostatin levels among the groups is significant (P=0.001). There was a significant decrease in myostatin levels between exercise+supplement+diabetes group with diabetes (P=0.002). There was also a significant difference between the supplement+diabetes and exercise+diabetes groups (P=0.009). Also, the results showed that the difference in follistatin levels among the groups is significant (P=0.001). The results showed that follistatin levels in the heart tissue increased significantly between the groups of diabetes, exercise+diabetes, supplement+diabetes and exercise+supplements+diabetes with the control group (respectively: P=0.005; P=0.001; P=0.001; P = 0.001).
It seems that moderate intensity aerobic exercise and quercetin supplementation have a positive and beneficial effect on the levels of myostatin and folstatin.
Masoud Barzegar, Malihe Hadadnezhad, Sadredin Shojaedin, Amir Letafatkar, Rose Fouladi,
Volume 21, Issue 26 (12-2023)
Abstract
The aim of this research was effect of eight weeks of neuromuscular training (NMT) with and without cognitive-dual tasks (DTs) on proprioception and balance of athletes with ACL deficiency (ACL-D). 39 soccer players with ACL-D were selected purposefully and randomly divided into three groups of 13 (control group, neuromuscular training group and neuromuscular training with dual tasks group). Two training groups performed the exercises for eight weeks and three sessions per week. cognitive-motor dual tasks were performed in one of the groups along with neuromuscular exercises in the form of counting down numbers, memorizing numbers, calculating unexpected equations, specialized football skill movements. The results of the current study indicated that there was no significant difference in knee joint proprioception in the open and closed kinetic chain after applying the intervention between the three groups, but there was a significant difference in lower extremity performance of the athletes based on the Y balance test in the anterior and posterior-lateral direction between the three groups (p<0.05). It seems that providing neuromuscular exercises along with cognitive-dual tasks can probably be considered as a useful approach to improve lower extremity performance based on the Y balance test in athletes with anterior cruciate ligament deficiency.
